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      <title>Mybatis的xml文件和接口怎么绑定的 - 交互式测验</title>
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    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>Mybatis的xml文件和接口怎么绑定的 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
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                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
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                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
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                <div class="quiz-footer" id="quiz-footer">
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      <script>
        const quizData = [
  {
    "question": "在MyBatis的XML映射文件中，<mapper>标签的`namespace`属性起到了什么关键作用？",
    "options": [
      "它定义了该XML文件所连接的数据库实例名称。",
      "它声明了该XML文件必须遵循的DTD或Schema规范。",
      "它用于指定该XML文件绑定的Mapper接口的完整类名，以确保SQL语句的唯一性。",
      "它为该映射文件中的所有SQL语句设置了默认的事务隔离级别。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "`namespace`属性的核心作用是将XML映射文件与一个具体的Java Mapper接口进行绑定。MyBatis通过这个唯一的命名空间（通常是接口的完整类名）来定位和执行对应的SQL语句，从而避免了不同映射文件中可能存在的ID冲突。",
    "source": "文档中「XML 文件与接口绑定的细节」部分的「1. 命名空间（Namespace）」",
    "hint": "这个属性就像是XML文件和Java接口之间的“身份证号码”，用于精确匹配。"
  },
  {
    "question": "在MyBatis中，一个Java Mapper接口中的方法（如 `getUserById`）是如何与XML映射文件中的特定SQL语句关联起来的？",
    "options": [
      "通过方法在接口中定义的顺序与XML中SQL语句的顺序一一对应。",
      "通过`parameterType`和`resultType`属性自动匹配最合适的方法签名。",
      "通过确保XML中SQL语句标签（如`<select>`）的`id`属性值与接口中的方法名完全一致。",
      "通过在接口方法上使用特定注解来指定XML文件的绝对路径。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "MyBatis的核心绑定规则是：Mapper接口中的方法名必须与XML映射文件中SQL语句标签的`id`属性值相匹配。这样，当调用接口方法时，MyBatis就能通过 `namespace + id` 的组合找到并执行对应的SQL。",
    "source": "文档中「XML 文件与接口绑定的细节」部分的「2. 方法与 SQL 语句的绑定」",
    "hint": "当你调用一个Java方法时，MyBatis需要一个明确的标识符来在XML中找到对应的SQL。"
  },
  {
    "question": "开发者通常只定义Mapper接口（例如 `UserMapper`），并没有编写其实现类。在运行时，我们是如何获得一个可以执行SQL的`UserMapper`实例的？",
    "options": [
      "MyBatis在运行时会为Mapper接口动态生成一个代理（Proxy）实现类，该代理类负责执行SQL调用。",
      "MyBatis要求开发者必须手动编写一个实现了Mapper接口的具体类。",
      "Spring框架的依赖注入功能会自动创建一个匿名的实现类。",
      "MyBatis使用Java反射机制直接调用XML文件中的SQL，并不需要接口的实例。"
    ],
    "correctAnswerIndex": 0,
    "explanation": "MyBatis利用了Java的动态代理技术。当你通过 `SqlSession.getMapper(UserMapper.class)` 请求一个Mapper实例时，MyBatis会动态创建一个实现了 `UserMapper` 接口的代理对象。调用这个代理对象的方法时，它会拦截调用，并根据方法名去执行XML中对应的SQL语句。",
    "source": "文档中「XML 文件与接口绑定的细节」部分的「4. 自动生成实现类」",
    "hint": "文档中提到了一个关键方法 `SqlSession.getMapper(...)`，这个过程是自动的，而不是手动的。"
  },
  {
    "question": "在 `UserMapper` 接口中有一个方法 `User getUserById(@Param(\"id\") int userId)`。在对应的XML文件中，应如何正确引用这个参数？",
    "options": [
      "使用 `${userId}` 来引用。",
      "使用 `#{id}` 来引用。",
      "使用 `#{userId}` 来引用。",
      "使用 `?` 作为占位符，MyBatis会自动按顺序匹配。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "当在Mapper接口的方法参数前使用 `@Param(\"...\")` 注解时，注解中定义的字符串（本例中为 \"id\"）就是该参数在XML文件中的名称。因此，在SQL语句中应使用 `#{id}` 来引用这个值。`#{}`语法会创建预编译语句参数，可以有效防止SQL注入。",
    "source": "文档中「XML 文件与接口绑定的细节」部分的「3. 参数传递」",
    "hint": "请注意`@Param`注解的作用，它为方法参数提供了一个在XML中可以引用的“别名”。"
  },
  {
    "question": "根据文档，将SQL语句从Java代码中分离到XML文件中进行管理，带来的主要优点之一是什么？",
    "options": [
      "显著提升了SQL的执行速度，因为XML解析比Java反射更快。",
      "保证了绝对的类型安全，因为XML有严格的DTD或Schema校验。",
      "提高了代码的解耦性，使得SQL的修改和优化可以独立于Java业务逻辑代码进行。",
      "简化了数据库连接池的管理与配置。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "将SQL语句放在XML文件中，实现了数据访问层逻辑与业务逻辑的分离（解耦）。这使得数据库管理员或专门的SQL开发者可以专注于优化SQL，而Java开发者则专注于业务逻辑，双方的修改互不影响，大大提高了项目的可维护性和灵活性。",
    "source": "文档中「MyBatis XML 与接口绑定的优点」部分的「解耦性」和「灵活性」",
    "hint": "思考一下当需求变更需要修改一条复杂的SQL时，如果SQL写在Java代码里和写在XML里，哪种方式更方便维护？"
  },
  {
    "question": "在MyBatis的全局配置文件（如`mybatis-config.xml`）中，`<mappers>`标签的主要作用是什么？",
    "options": [
      "用于配置数据库连接的具体参数，如URL和用户名。",
      "用于注册和指定MyBatis框架需要加载和解析的Mapper XML映射文件的位置。",
      "用于设置全局的缓存策略和插件。",
      "用于定义所有Mapper接口需要继承的公共父接口。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "`<mappers>`标签是MyBatis配置文件的核心部分之一，它告诉MyBatis框架去哪里寻找定义了SQL语句的XML映射文件。只有在这里通过`<mapper resource=\"...\"/>`等方式注册过的映射文件，MyBatis才能在启动时加载它们，并完成接口与SQL的绑定。",
    "source": "文档中「3. MyBatis 配置文件」部分的代码示例",
    "hint": "这个标签是连接全局配置和具体SQL映射文件的“桥梁”。"
  }
];
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            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

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        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
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      </script>
    </body>
    </html>
  